Fixed typo

Author: Jan-Olof Hendig

doc/Type/Uni.pod6

@@ -46,7 +46,7 @@ Returns a NFKC (Normal Form Compatibility Composed)-converted version of the inv
 
     method NFKD(Uni:D: --> NFKD:D)
 
-Returns a NFD (Normal Form Compatibility Decomposed)-converted version of the invocant.
+Returns a NFKD (Normal Form Compatibility Decomposed)-converted version of the invocant.
 
 =head2 method codes